New Carburetor Replacement for Briggs Stratton 796109 594593 591731 796587 591736 594601 17.5HP 19HP 19.5HP with Gasket Kit

What It Is

This is an aftermarket carburetor replacement for select Briggs & Stratton single-cylinder engines used on riding mowers and lawn tractors. It includes a gasket kit and replaces OEM part numbers 796109, 594593, 591731, 796587, 591736, and 594601. Designed for engines in the 17.5HP to 19.5HP range, it controls the air-fuel mixture entering the engine.

Fitment & Compatibility

Before buying, check your engine’s model number (stamped on the valve cover or blower housing). This carburetor fits Briggs & Stratton engines with the following OEM carb numbers: 796109, 594593, 591731, 796587, 591736, and 594601. It does not fit all 17.5-19.5HP engines—only those using one of these specific carburetors. Also confirm your engine has a side-draft (horizontal) carburetor mount. Measure the mounting flange bolt spacing (typically 2.5 inches center-to-center) and the fuel inlet barb diameter. This is an aftermarket part, so fitment may vary slightly from OEM; expect to reuse your original mounting studs and possibly adjust the float height.

Key Things to Know

• Quality variance: At this price, the casting and gaskets may not match OEM precision. Inspect for burrs or flashing on the air/fuel passages before installation.
• Installation difficulty: Moderate. You’ll need to remove the old carburetor, clean the intake manifold surface, transfer your original choke and throttle linkages, and adjust the idle mixture screw (typically 1.5 turns out from lightly seated as a starting point).
• Common gotchas: The included gaskets may be thinner or thicker than OEM—check for vacuum leaks by spraying carb cleaner around the base while running. Also ensure the fuel shut-off solenoid (if present) is compatible; some aftermarket carbs lack the solenoid port.
• Tuning required: Expect to fine-tune the idle and main mixture after installation. A small tachometer helps set idle speed to 1750-1800 RPM.

Should You Buy It

Buy this if you have a Briggs engine using one of the listed OEM carb numbers and want a budget-friendly replacement that works for most non-commercial mowers. Skip it if you need exact OEM fitment, have a commercial-duty engine, or prefer to rebuild your original carburetor—spending $25-35 on an OEM or high-quality aftermarket unit may save tuning headaches.